Electric-light carbon



UNITED STATES PATENT FHQEQ THOMAS LANIER CLINGMAN, OF ASHEVILLE, NORTH CAROLINA.

ELECTRIC-LIGHT CARBON.

SPECIFICATION forming part of Letters Patent No. 381,614, dated April 24, 1888.

Application filed May 14, 1887. Serial No 238.249.

T 0 aZZ whom it may concern:

Be it known thatI, THOMAS LANIER CLING- MAN, a citizen of the United States, residing at Ashevillejn the county ofBuncombe and State of North Carolina, have invented certain new and useful Improvements in Electric Lighting, ofwhich the following is a full, clear, and exact description.

My invention relates especially to the carbons or pencils used for are or other electric lighting purposes; and it consists in mixing with any variety of such carbons or pencils powdered serpentine, adapted to prevent the too rapid consumption of the same.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now describe a preferred manner of carrying the same out.

In manufacturing my carbons I combine with the carbonaceous material a mineral sub stance, such as serpentine, this substance be (No specimens.)

ing first reduced to a finely-powdered condition and then mixed with the carbon of the pencil in any suitable manner. By thus introducing into the composition of the pencil or carbons an agent that resists the rapid dissolution or consumption of the same I am enabled to provide carbons which greatly im prove the quality of the light. At the same time they offer a resistance to the wearing effect of the light that greatly adds to their efficiency and prolongation of their usefulness.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

An electricarc-light carbon having powdercd serpentine commingled with its composition.

THOMAS LANIER CLINGMAN.

Witnesses:

J OHN H. NEWMAN, B. F. DEnIsoN, 

